Philips Application Developer Interview Questions and Answers

OOPs stands for Object-Oriented Programming and has 4 main parts: Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundles data and methods that operate on the data into a single unit.

• Polymorphism: Allows objects to be treated as instances of their parent class.

• Abstraction: Hides complex implementation details and

Abstract class can have both abstract and non-abstract methods, while Interface can only have abstract methods.

• Abstract class can have constructors, fields, and methods, while Interface cannot have any implementation.

• A class can extend only one Abstract class but can implement multiple Interfaces.

• Abstract classes are used to define a common behavior for subclasses, while Interfaces are used to define a contract for cla...read more

SOLID principles are a set of five design principles that help developers create more maintainable and scalable software.

• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subcla...read more